Patent US2817873A successfully refreshed from Google Patents.
US2817873A
Expired / Lapsed
US
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Extruding apparatus
Assignee: NEEDHAM Manufacturing Co Inc
•
Filing: 1956-06-15
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Granted: 1957-12-31
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Expires: 1976-06-15
Abstract
No abstract record available.
Inventors
- 👤 William F Spang
- 👤 Wesley E Lazott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:30
CPC Classifications
A; A22; A22C; A22C7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |